Hawthorn Shield Bug

Fascinating facts about the Hawthorn Shield Bug

• Its range has pushed far north since the 19th century, now reaching the Scottish Highlands. The species is found across Europe, from Portugal to Russia, and is common in the southern part of Great Britain, showing a broad continental distribution. Records indicate it was first reported as far north as Manchester only in 1892, but it has since spread into Northern England and the Scottish Highlands, illustrating a clear northward expansion over more than a century.
• When disturbed the bug releases an orange secretion from gland openings in the thorax. Like many so-called "stink bugs", it may also emit an unpleasant odour when threatened.
• A dark green trapezoidal band runs across its scutellum, spanning the final third of the body from the pronotum to the forewing membrane. This band extends from the dorsal pronotum to the hemelytral membrane, marking a distinctive colour pattern. The front wings lie flat when the insect is not flying, and the sclerotised pronotum and corium regions are coloured dark red, giving the bug a striking two-tone appearance.
• The hawthorn shield bug's rostrum is a needle-shaped, double-tubed proboscis formed when the mandibular and maxillary stylets interlock and are covered by the labium. This specialised organ is driven into plant tissue, where it first injects saliva enzymes that begin breaking down the cells. The enzymes act on the leaf's mesophyll vascular tissue, allowing the bug to draw the resulting liquid up through the opposite end of the rostrum.
• The hawthorn shield bug's chief food is the haws of the hawthorn tree, but adults are not limited to this single source. In winter they can survive by feeding on leaves and are regularly observed on other trees such as pedunculate oak, sessile oak and whitebeam.

Sources

Every fact above was checked against these pages, and kept only where one of them states it.

• Wikipedia

At a glance

About the Hawthorn Shield Bug

In the dappled light of woodland edges, the Hawthorn Shield Bug moves with a quiet purpose, its mottled brown carapace blending seamlessly into the rustling undergrowth as it searches for the sweet, sticky sap of its beloved hawthorn trees. With each deliberate step, its sturdy legs propel it forward, driven by an unyielding determination to exploit the bounty of its native habitat, where the intricate dance of predator and prey plays out in secret. As it feeds, its very existence is a testament to the enduring, if oft-overlooked, beauty of the natural world, a tiny, unassuming marvel that weaves its own unique thread into the rich tapestry of life.

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